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A permanent magnet motor

A permanent magnet motor and computing circuit technology, applied in the direction of single motor speed/torque control, electronic commutator, etc., can solve problems such as poor reliability, achieve the effects of reducing mass, accurate detection, and improving dynamic performance

Active Publication Date: 2018-01-26
HUAZHONG UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sensor technology that relies on optics and vision has relatively high requirements on the light in the environment, and the sensorless detection technology can provide more accurate rotor position at medium and high speeds, but as the speed decreases, the detection results of this method will decrease. poor reliability

Method used

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Embodiment 1

[0081] Such as Figure 5 The two-degree-of-freedom (x, y) planar motor system model shown is composed of six permanent magnets as the stator and a circular coil winding as the mover. The dimensions of the permanent magnet (PM) and stator coil (EM) are shown in Table 1 shown, where a o means diameter, l means height a i Indicates the inner diameter of the stator coil, d indicates the inner diameter of the stator coil, M 0 Indicates the magnetization intensity of the permanent magnet, μ 0 Indicates the magnetic permeability of the vacuum. The distance between the permanent magnets is 5mm. Taking the spatial position of one of the stator coils as point O, the movement plane of the motor rotor in space is the xoy plane to establish a plane coordinate system, then x, y are in the plane coordinate system The spatial position of the motor rotor.

[0082] Table 1

[0083]

[0084]

[0085] According to the motor parameters in Table 1, the magnetic induction intensity distri...

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Abstract

A permanent magnet motor comprises a stator coil (1a) and a rotor (2), and also comprises an operation module (1b), the operation module comprising a magnetic field sensor, a first operation circuit, and a second operation circuit which are connected in sequence. The magnetic field sensor is disposed in the stator coil, and is used for detecting magnetic induction intensity B0, and inputting B0 to the first operation circuit; the first operation circuit is used for acquiring magnetic induction intensity BPM of the rotor on the magnetic field sensor by using B0, and inputting BPM to the second operation circuit; and the second operation circuit is used for acquiring the position of the rotor by using BPM, a state signal of the rotor being the velocity v, the acceleration a or an inertial force Fi of the rotor. Also disclosed are a stator coil and an operation module used for the permanent magnet motor. The permanent magnet motor is able to efficiently and accurately measure the position of a rotor in a motor, thereby further realizing accurate control on the motor.

Description

technical field [0001] The invention belongs to the technical field of motor control, and more specifically relates to a permanent magnet motor. Background technique [0002] During the closed-loop control process of the permanent magnet motor, state signals such as the position and speed of the motor rotor must be measured in real time. For the multi-degree-of-freedom motor system, the existing measurement method relies on the decoupling of multiple degrees of freedom by an external mechanism and measures them separately with a single-axis encoder. The mechanical decoupling mechanism itself will limit the movement of the motor, and will increase the self-weight and friction of the entire system, thus seriously affecting the dynamic performance and stability of the motor and motion system. At the same time, after a period of use, the position caused by mechanical wear Loss of precision is a serious problem. Contact sensors (such as inclination sensors, gyroscopes or magnet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/06H02P6/16
CPCH02P6/06H02P6/16
Inventor 白坤李国民陆锦锦
Owner HUAZHONG UNIV OF SCI & TECH